Phosphor, production method thereof, phosphor-containing composition, light emitting device, and display and illuminating device

a technology of phosphor and phosphor, which is applied in the direction of solid-state devices, discharge tubes/lamp details, electrical apparatus, etc., can solve the problems of insufficient brightness of previously known green oxide phosphors, and achieve superior temperature characteristics, high emission intensity and brightness, and superior light-emitting devices
US20100090585A1Inactive Publication Date: 2010-04-15MITSUBISHI CHEM CORP
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Patent Information

Authority / Receiving Office
US · United States
Patent Type
Applications(United States)
Current Assignee / Owner
MITSUBISHI CHEM CORP
Publication Date
2010-04-15
Estimated Expiration
Not applicable · inactive patent

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Abstract

To provide a phosphor that stably shows high emission intensity and brightness as well as superior temperature characteristics, under excitation by near-ultraviolet light, the phosphor contains an alkaline-earth metal aluminate and has a crystal phase comprising an alkali metal element and, in that crystal phase, the rate of substituted Eu (europium) to the number of sites which can be substituted with Eu of the crystal phase is 25% or higher and the ratio of the alkali metal element to the number of sites which can be substituted with Eu of the crystal phase is 3% or lower.
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Description

TECHNICAL FIELD

[0001] The present invention relates to a phosphor that emits green or blue fluorescence and a production method thereof, a phosphor-containing composition and light emitting device using the phosphor, and a display and illuminating device using the light emitting device. More particularly, it relates to a green or blue phosphor that shows high emission intensity even under excitation by near-ultraviolet light, a phosphor-containing composition and light emitting device using the green or blue phosphor, and a display and illuminating device using the light emitting device.BACKGROUND ART

[0002] White light, which is essential in uses for an illuminating device and display, is generally obtained by mixing blue, green and red light emissions in accordance with the additive mixing principle of light. For backlights of color liquid crystal displays, which are a field of uses of displays, it is preferable that each of blue, green and red luminous bodies has as high emission in...

Claims

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